Insect & Disease
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Signs of pests and diseases will vary from tree to tree. Search our database of pests and diseases for symptoms, damages, life cycle, management, and control information.

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Damage & Symptoms
Pest And Disease Lace Bugs Banner 1440X500
Spotting on Leaf
Lace Bugs
Lace bugs are sap-sucking pests that feed on deciduous and evergreen plants during the spring and summer, weakening their host plants. These pests thrive in full sun under dry conditions. Depending on the species, they are about 1/8-inch long and whitish with tan markings.
Pest And Disease Center Leaf Spot And Melting Out Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Leaf Spot & Melting-Out
Leaf spot and melting-out are turfgrass fungal diseases that can cause indefinite yellowing and thinning of grass, as well as large patches of dead turfgrass.
Pest And Disease Maple Decline Banner 1440X500
Dieback or Thinning Canopy
Maple Decline
Maple decline is a condition that causes dieback in maple trees.
Pest And Disease Mites Banner 1440X500
Leaf or Needle Discoloration
Mites
Mites are nearly invisible, but they can cause destruction that will surely be noticed on a variety of indoor and outdoor trees, shrubs and plants. Signs that mites are present include spotting, bronzing or yellowing of leaves and the presence of small webs between twigs.
Pest And Disease Center Mole Crickets Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Mole Crickets
Mole crickets are pests that tunnel through turf to feed on and ultimately damage roots. Their unique front legs enable them to burrow through lawn soil, creating both a hideaway and feeding spot.
Pest And Disease Center Needle Blight Banner 1440X500
Leaf or Needle Discoloration
Needle Blight & Cast Of Pines
Brown spot needle blight, Cyclaneusma needle cast, Dothistroma needle blight, and Lophodermium needle cast are common fungal diseases that attack pine needles, causing spots, blights, and premature defoliation.
Pest And Disease Northern Tooth Fungus Banner 1440X500
Mold or Fungus
Northern Tooth Fungus
Northern tooth fungus grows on living, deciduous trees. The fungus grows in shelves of fruiting bodies that overlap in clusters.
Pest And Disease Oak Bracket Banner 1440X500
Mold or Fungus
Oak Bracket Fungus
Oak bracket is a fibrous, “weeping” fungus that grows at the base of oak trees. The thick fruiting body is called a conk and varies from 2-12cm in width. The surface is a creamy brown color with pitted tubes that secrete an orange/amber liquid when young.
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